Abrading element



July 23, 1935. K. w. CONNOR ABRADING ELEMENT Filed NV. l1, 1951 u l 1db//l//ll/ INVENTOR h/re I4( 602727021 l WIr-romlays.

Patented July 23, 1935 UNITED STATES 2,009,222 ABBADING ELEIWENT KirkeW.

of Michigan l Connor, Detroit,

Micromatic Hone Corporation,

Mich., assignmto a. corporation Application November' 11, 1931, serialNo. 514,380

3 Claims.

My invention relates to abrasive elements and particularly to anabrasive element of the composite type constructed in such manner as tobe resilient and containing a lubricant.

While my abrasive element will be herein described in relation to itsuse as an element for a honing tool, it is to be understood that in itsbroad aspects the abrasive element may be utilized on any dressingmachine and especially on machines where rapid grinding, accompanied byhigh polish, is desired.

The main objects of my invention are; to provide an abrasive element oithe composite type which is made up from an abrasive material, a fillingmaterial, a lubricant and a bond to form a unit abrasive element; toprovide an abrasive element which is resilient and compressible anamount proportional to the cut to be made, the degree of which reducesdirectly with the compression. To provide a lubricant as a contiguouspart of the element to eect its lubrication in the presence oi heavycutting and to effect a high polish as the degreeo cut reduces; toprovide a lubricant which is preferably a solid such that may be bondedalong with the abrasive and ller material, or which may form part of thebinder or which may be a fluid and absorbed by the nller or othermaterial, all oi which go to'make up my composite abrasive element.

Other objects and features ci novelty oi my invention will be eitherspecifically pointed out or will become apparent when referring, for abetter understanding o my invention, to the following description inconjunction with the accompanying drawing, wherein:

vFigure l. is a perspective view, in section, oi an abrasive elementembodying features oi my invention,

Fig. 2 is a view' similar to that or Fig. i, showing a modied form whichinvention may assume, and

Fig. 3 is a view similar to Figs. i and 2, showing a further modied formwhich my invention may assume.

Referring to Fig. i, the abrasive element 5 is retained in a metalsupporting element e through the medium oi an adhesive material ll whichbinds the element to the metal in a well known manner. The abrasiveelement b is constructed oi-a composition of materials, comprising a bor ller material which is preferably resilient and may be oi corkparticles, macerated duck or like materials which may have a certaindegree oil porosity im' absorbing and retaining a lubricant such as oil.The cork is bonded with an abrmive terial which may be carborundum orlike well known abradant. The bonding material may be any well knownadhesive such as glue, a phenol compound known in the trade as bakelite,a shellac or other suitable substance which preferably has 5 a certaindegree of resiliency. In the place of providing a lubricant such asmineral oil which is absorbed by the ller or other material, thelubricant may be a solid, such as graphite or parafii or the like, or acombination thereof with the lo bonding material to form a lubricatingbinding compound which retains the abrasive'material bonded to the llermaterial.

The composite abrasive element thus formed is resilient and embodiesdesirable features not 15 present in abrasive elements of the solid typeheretofore employed. For example, when the element is employed in ahoning tool, the tool may be considerably simplified by having theadvancing bias, heretofore provided therein, elimg@ inated and thesetting of the tool to provide the proper degree of cut will ensue byadjusting the tool to compress the abrasive element a predeterminedamount. After the element has been adjusted in this manner, the initialoperation of g5 the elements under compression will effect a rapidcutting of the cylinder Wall and as the cutting proceeds the compressionof the abrasive element is reduced with a like reduction in the degreeof cut effected by the element. As the compres- 3o sion of the honingelement decreases the amount of cut in the presence of the lubricant ismaterially decreased effecting a high polish to the surface. Thisdesirable feature of the flexible abrasive element obtains when theelement is 35 employed for grinding surfaces other than the surfaces ofcylinder bores.

In Fig. 2, li have illustrated a modified form of abrasive elementswhich comprises a resilient body member il of channel shape having acene@ trai groove 'l2 in which an abrasive material i3 is disposed. Theabrasive material may be bonded with a lubricant, the lubricant may beabsorbed by the resilient body member il or the particles lubricant.resilient and the benefits derived therefrom, as pointed out in regardto the abrasive element illustrated in Fig. l, obtains for the structureillustrated in Fig. 2.

A further modified form of the abrasive element is illustrated in Fig. 3wherein the lubricant i6, the abrasive material i5 and the resilientiiller or body members it are provided in individual strips andassembled together to eiect a 55 composite element having the resilientfeatures pointed out with regards to the form of the inventionillustrated in Figs. 1 and 2.

It is to be understood that other methods and means of assembling theabrasive, the lubricating and the illler materials to form a resilientabrasive element may be utilized such, for example, as providing pads offelt or like material in the form illustrated in Fig. 3 in which amineral oil or like lubricant may be retained. In a similar manner, thematerial Il in Fig. 2 may be the abrading material and the felt pad maybe the element I3 disposed therein. Oil may be applied to the pad whichwill be absorbed and retained for eiecting the desired lubrication and awet type of honing in a dry manner. In any instance, the broad aspect ofmy invention pertains to the resilient and lubricating features of thecomposite abrasive element which is submitted to be new in the art.

While I have described and illustrated several embodiments of myinvention, it will be apparent to those skilled in the art that variouschanges, omissions, additions and substitutions may be made thereinwithout departing from the spirit and scope of my invention, as setforth in the accompanying claims.

I claim as my invention:

1. A composite abrading stick including, in combination, a length ofabrading material in the nature of a solid stick, and a length ofmaterial which will absorb a liquid, one of said lengths being slottedto receive the other.

2. A composite abrading stick including, in combination, a. length ofabrading material in the nature of a solid stick, and a length of amaterial containing a lubricant, one of said lengths being slotted toreceive the other.

3. A composite abrading stick including, in combination, a. length ofabrading material in the nature of a solid stick, and a length oflubrieating material, one of said lengths being slotted 20 to receivethe other.

KIRKE W. CONNOR.

